14 J of heat are removed from a gas sample while it is being compressed by a piston that does 28 J of work. What is the change in the thermal energy of the gas?
How does change the temperature of the gas?

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

Who was the first scientist to measure speed as distance over time?

What can you increase the strength of an electromagnet by